Knocking a wall down - costs

[Ineedtocleanmywoodenblinds]

I know this is a how long is a piece of string question but just wanted to see if anyone could help with costs.

Victorian house and wanted to get internal wall knocked down between kitchen and utility room and put bifold (or similar) doors in at the back.

We're in London.

Is it a supporting wall? If so, you're looking at about 5k.

Thank you - £5k including getting bifolds put in?

Sorry - no I missed that bit. I'd add on another 2k.

Where are you wanting to put the bifold?

At the back where the loo is at the moment (obviously ripping that out ;)

Are you planning on extending across? Or literally just putting bifolds in for those 2m?